Random Password Generator
Everyday & OtherGenerate cryptographically secure random passwords and passphrases with custom length, uppercase, lowercase, numbers, and special symbols with instant bit entropy evaluation.
Entropy: ≈ 104.4 bits · Charset pool: 92 chars
About this calculator
Using strong, unique passwords across online services is the first line of defense against credential stuffing and brute-force cracking attacks. Weak passwords containing personal names or dictionary words can be cracked in seconds by modern GPU clusters.
This tool generates cryptographically random passwords utilizing browser Web Crypto API (crypto.getRandomValues), evaluating password bit entropy (E = L × log2(R)) and estimating time required to brute-force crack the generated string.
How It Works & Formula
Character pool size R is determined by enabled character sets (lowercase = 26, uppercase = 26, digits = 10, symbols = 32). Entropy E = Length × log2(R). Passwords above 80 bits of entropy are virtually uncrackable against offline brute force.
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